@media(min-width:768px) {
    .navbar {
        min-height: 40px;
    }
}

.jumbotron {
    position: relative;
    background: linear-gradient(45deg, #020031 0, #6d3353 100%);
}


/* after:内联属性，如果要设置宽高或者背景色，需要给设置定位; */

.jumbotron::before {
    content: "";
    display: block;
    position: absolute;
    z-index: 1;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url(images/bs-docs-masthead-pattern.png) repeat center center;
}

.masthead {
    color: #fff;
    padding: 100px 0;
}

.masthead h1 {
    font-size: 100px;
    font-weight: bold;
}

.masthead p {
    position: relative;
    z-index: 2;
    margin-top: 20px;
}

.masthead .small-title {
    color: #999;
    font-size: 14px;
}

.masthead .small-title:hover {
    color: #fff;
    text-decoration: underline;
}


